I went caving around Carlsbad Caverns in New Mexico last summer (July 2000). More on it later, but here is a photo taken by mouser, in Black Cave in the Guadalupe Mountains.

My butt, going through a "Liana-sized hole" under the main passage of the cave

I also really enjoy rock climbing. I try to climb as often as possible at the Mill City Rock Gym in Dracut, MA; the atmosphere is friendly and they have an MIT discount. I need to get more time on real rocks.

My butt, again - this time climbing "Tarzan" at Crow Hill near Leominster. My technique sucks. And to be honest, I didn't complete the climb. But the swing out off the face was great! (photo by abbe)